dt-bindings: net: bluetooth: Add device property firmware-name for QCA6174

This patch adds an optional device property "firmware-name" to allow the
driver to load customized nvm firmware file based on this property.
Signed-off-by: NRocky Liao <rjliao@codeaurora.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Documentation/devicetree/bindings/net/qualcomm-bluetooth.txt

@@ -17,6 +17,7 @@ Optional properties for compatible string qcom,qca6174-bt:
 
  - enable-gpios: gpio specifier used to enable chip
  - clocks: clock provided to the controller (SUSCLK_32KHZ)
+ - firmware-name: specify the name of nvm firmware to load
 
 Required properties for compatible string qcom,wcn399x-bt:
 
@@ -28,6 +29,7 @@ Required properties for compatible string qcom,wcn399x-bt:
 Optional properties for compatible string qcom,wcn399x-bt:
 
  - max-speed: see Documentation/devicetree/bindings/serial/slave-device.txt
+ - firmware-name: specify the name of nvm firmware to load
 
 Examples:
 
@@ -40,6 +42,7 @@ serial@7570000 {
 
 		enable-gpios = <&pm8994_gpios 19 GPIO_ACTIVE_HIGH>;
 		clocks = <&divclk4>;
+		firmware-name = "nvm_00440302.bin";
 	};
 };
 
@@ -52,5 +55,6 @@ serial@898000 {
 		vddrf-supply = <&vreg_l17a_1p3>;
 		vddch0-supply = <&vreg_l25a_3p3>;
 		max-speed = <3200000>;
+		firmware-name = "crnv21.bin";
 	};
 };